Enable/Disable VMware High Availability

Enable/Disable VMware High Availability

VMware HA shows off in Vsphere Client 5.1.0. I would like to know if there is any negative impact before I enable HA.

Thank you
jskfanAsked:
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Nick RhodeIT DirectorCommented:
Shouldn't be any by just enabling it.  You would want to make sure you have the resources to move servers around.  Also make the the hardware is compatible host to host for you might have to enable EVC mode.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
There is no negative impact of enabling VMware HA.

But check you have correctly followed the instructions and have met the prerequistes for installing. e.g. networking is correct.

Once you have Enabled VMware HA - make sure you test it correctly.

Are all your ESXi Host Servers the same, e.g. make and model, CPU and RAM?
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jskfanAuthor Commented:
they are Dell Poweredge R710

2ESX= 8 CPUs x 2.659GHz RAM=14446.10MB
4ESX= 12 CPUsx 2.659GHz RAM =98294.02MB

All 6 ESXs are in the same Cluster
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Should be no issues, if a server fails, but just keep an eye on the resources, because your servers are different specifications, and are not balanced. e.g. same RAM and CPUs!
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piyushranusriSystem Cloud SpecialistCommented:
no there will be no issue, if you are talking about just enable and disable.
first point you need to find out the reason behind that why  HA shows off in Vsphere Client 5.1.0





please share the output
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jskfanAuthor Commented:
HA shows Off , I believe they did not enable it..
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
If your require VMware HA, then Edit Cluster Settings, and put a tick in the box!
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jskfanAuthor Commented:
Thank you Guys!
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